AirHint found the following cheapest return flights from Zagreb (ZAG) to Helsinki (HEL) in December 2025 (see full year).
Return flights
| 31 Dec - 11 Jan | Ryanair | ||
| 31 Dec - 14 Jan | Ryanair | ||
| 25 Dec - 01 Jan | KLM | ||
| 31 Dec - 05 Jan | Ryanair | ||
| 29 Dec - 09 Jan | Ryanair | ||
| 27 Dec - 04 Jan | Ryanair | ||
| 26 Dec - 02 Jan | Croatia Airlines | ||
| 24 Dec - 03 Jan | KLM |
Also check the deals for one-way flights from Zagreb to Helsinki in December.
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